Fix internal document link handling (#410)

Co-authored-by: Hugo Locurcio <hugo.locurcio@hugo.pro>

syntaxes/examples/Example.gd

@@ -0,0 +1,4 @@
+extends Node
+
+func _ready():
+	pass

syntaxes/examples/Example.tscn

@@ -0,0 +1,93 @@
+[gd_scene load_steps=7 format=2]
+
+[ext_resource path="res://Example.gd" type="Script" id=1]
+
+[sub_resource type="Environment" id=1]
+background_mode = 4
+tonemap_mode = 3
+glow_enabled = true
+glow_blend_mode = 0
+
+[sub_resource type="Animation" id=2]
+resource_name = "RESET"
+tracks/0/type = "value"
+tracks/0/path = NodePath("CanvasLayer/Panel:modulate")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0 ),
+"transitions": PoolRealArray( 1 ),
+"update": 0,
+"values": [ Color( 0, 0, 0, 0 ) ]
+}
+
+[sub_resource type="Animation" id=3]
+resource_name = "dim"
+tracks/0/type = "value"
+tracks/0/path = NodePath("CanvasLayer/Panel:modulate")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0, 1 ),
+"transitions": PoolRealArray( 1, 1 ),
+"update": 0,
+"values": [ Color( 0, 0, 0, 0 ), Color( 0, 0, 0, 0.501961 ) ]
+}
+
+[sub_resource type="Animation" id=4]
+tracks/0/type = "value"
+tracks/0/path = NodePath("CanvasLayer/Panel:modulate")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0, 1 ),
+"transitions": PoolRealArray( 1, 1 ),
+"update": 0,
+"values": [ Color( 0, 0, 0, 1 ), Color( 0, 0, 0, 0 ) ]
+}
+
+[sub_resource type="Animation" id=5]
+tracks/0/type = "value"
+tracks/0/path = NodePath("CanvasLayer/Panel:modulate")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0, 1 ),
+"transitions": PoolRealArray( 1, 1 ),
+"update": 0,
+"values": [ Color( 0, 0, 0, 0 ), Color( 0, 0, 0, 1 ) ]
+}
+
+[node name="Main" type="Node"]
+script = ExtResource( 1 )
+
+[node name="World" type="Node2D" parent="."]
+
+[node name="WorldEnvironment" type="WorldEnvironment" parent="."]
+environment = SubResource( 1 )
+
+[node name="CanvasLayer" type="CanvasLayer" parent="."]
+layer = 128
+
+[node name="Panel" type="Panel" parent="CanvasLayer"]
+modulate = Color( 0, 0, 0, 0 )
+anchor_right = 1.0
+anchor_bottom = 1.0
+mouse_filter = 2
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="FadePlayer" type="AnimationPlayer" parent="."]
+anims/RESET = SubResource( 2 )
+anims/dim = SubResource( 3 )
+anims/fade_in = SubResource( 4 )
+anims/fade_out = SubResource( 5 )

syntaxes/examples/rainbow_gradient_shader.tres

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+[gd_resource type="ShaderMaterial" load_steps=2 format=2]
+
+[sub_resource type="Shader" id=63]
+code = "// HSV to RBG from https://www.rapidtables.com/convert/color/hsv-to-rgb.html
+// Rotation matrix from https://en.wikipedia.org/wiki/Rotation_matrix
+
+shader_type canvas_item;
+
+const float PI = 3.1415926535;
+
+uniform float strength: hint_range(0., 1.) = 0.5;
+uniform float speed: hint_range(0., 10.) = 0.5;
+uniform float angle: hint_range(0., 360.) = 0.;
+
+void fragment() {
+	float hue = UV.x * cos(radians(angle)) - UV.y * sin(radians(angle));
+	hue = fract(hue + fract(TIME  * speed));
+	float x = 1. - abs(mod(hue / (1./ 6.), 2.) - 1.);
+	vec3 rainbow;
+	if(hue < 1./6.){
+		rainbow = vec3(1., x, 0.);
+	} else if (hue < 1./3.) {
+		rainbow = vec3(x, 1., 0);
+	} else if (hue < 0.5) {
+		rainbow = vec3(0, 1., x);
+	} else if (hue < 2./3.) {
+		rainbow = vec3(0., x, 1.);
+	} else if (hue < 5./6.) {
+		rainbow = vec3(x, 0., 1.);
+	} else {
+		rainbow = vec3(1., 0., x);
+	}
+	vec4 color = texture(TEXTURE, UV);
+	COLOR = mix(color, vec4(rainbow, color.a), strength);
+}"
+
+[resource]
+shader = SubResource( 63 )
+shader_param/strength = 0.5
+shader_param/speed = 0.5
+shader_param/angle = 0.0